144-111-PI-CAL-006_R1

Project No : 040176

PIPING FLEXIBILITY ANALYSIS

Client : Petro Canada

Project : De Ruyter Production Platform

Location : P11-b

Document number: 144-111-PI-CAL-006 Rev. no : R1 Page : 1 of 10


PIPING SYSTEM

SK-006

PREPARED FOR

By:Iv-Oil & Gas b.v

Rev. Description Date By Checked Appr’d by

R1 For Comments / Approval 01-07-2004 H.v.d.Weele R. Tjin M. van Neck

Project No : 040176




Location : P11-b


Rev. Description Date By Checked Appr’d by

R1 For Comments / Approval 01-07-2004 H.v.d.Weele R. Tjin M. van Neck

Project No : 040176




Location : P11-b


TABLE OF CONTENTS Page

INTRODUCTION................................................................................................................................................. 31.1 SCOPE OF WORK.............................................................................................................................. 31.2 APPLICABLE CODES......................................................................................................................... 31.3 REFERENCE DOCUMENTS..............................................................................................................3

2. SYSTEM DESIGN.......................................................................................................................................... 42.1 LINE DATA........................................................................................................................................... 42.2 CII Calculations.................................................................................................................................... 42.3 DESIGN LOAD CASES........................................................................................................................ 52.4 ALLOWABLE STRESSES...................................................................................................................62.5 BLAST CALCULATIONS..................................................................................................................... 62.6 PIPE SUPPORTS................................................................................................................................ 72.7 FLANGE CONNECTIONS...................................................................................................................72.8 NOZZLE LOADS.................................................................................................................................. 7

3. STRESS ANALYSIS...................................................................................................................................... 83.1 COMPUTER MODEL........................................................................................................................... 8

4. ANALYSIS RESULTS................................................................................................................................... 94.1 STRESSES.......................................................................................................................................... 94.2 FLANGES............................................................................................................................................ 94.3 NOZZLE LOADS.................................................................................................................................. 9

APPENDICES

APPENDIX 1 STRESS SKETCHES

APPENDIX 2 PIPE SUPPORT DETAILED DRAWINGS

APPENDIX 3 CONSTRUCTION ISOMETRICS

APPENDIX 4 MISCELLANEOUS CALCULATIONS

APPENDIX 5 CAESAR II PRINTOUT

APPENDIX 6 NOZZLE LOADS

Project No : 040176




Location : P11-b


INTRODUCTION

1.1 SCOPE OF WORK

The purpose of this report is to demonstrate that piping system SK-005, part of De Ruyter topside piping, has inherent flexibility to accommodate displacements due to design conditions, without imposing any excessive loads on pipe supports and equipment nozzles. Furthermore the piping stress level has to satisfy the designated code.

1.2 APPLICABLE CODES

The governing code for piping design is:

ASME B31.3 Process Piping

For items not covered by the above-mentioned document, reference is made to the following codes and standards:

ASME VIII Rules for construction of pressure vessels, Division 1 and 2

ASME III Rules for Construction of Nuclear Facility Components, Division 1

ASME B16.5 Pipe Flanges and Flanged Fittings

WRC-107 Local stresses in Spherical and Cylindrical Shells due to External loadings

1.3 REFERENCE DOCUMENTS

144-002-PI-SPE-0002 Piping Classes Specifications

144-002-PI-SPE-0007 Plant Department Pipe Stress Design Criteria

144-111-PI-LST-0001 Plant Department Critical Line List

144-000-PR-LST-0001 Process Line List

144-000-ME-SPE-0004 Nozzle Loads on Equipment

144-002-HE-TNS-0007 Blast Design Strategy and Overpressures

Project No : 040176




Location : P11-b

Document number: 144-111-PI-CAL-006 Rev. no : R1 Page : 5 of 10 2. SYSTEM DESIGN

2.1 LINE DATA

Functional design data, used for analysis, is summarised below:

Item/ Line No.

Pipe

Cla

ss

Cor

rosi

on

Allo

wan

ce

Des

ign

Pres

sure

Hyd

rote

st P

ress

ure

Max

imum

Des

ign

Tem

pera

ture

Min

imum

Des

ign

Tem

pera

ture

Ope

ratin

g Te

mp.

Med

ium

Den

sity

Flan

ge R

atin

g

Drawing Number

- mm barg barg °C °C °C Kg/m3 # -

8”/10”-CO-200-009-B41-V

A41 3 25 37.5 75 -11 60 900 150200009-

0201/0501

10”-CO-200-009-B41-V A41 3 25 37.5 85 -11 60 900 150 200009-0204

8”-CO-200-009-B41-V A41 3 25 37.5 85 -11 60 900 150200009-

0202/0203

Note: Installation temperature assumed as -11°C throughout.

2.2 CII CALCULATIONS

The following CII calculations have been performed:

SK-006A-R1 : Design conditions

SK-006B1-R1 : Blast loads above EL. +26000.

Project No : 040176




Location : P11-b


2.3 DESIGN LOAD CASES

The Functional Loads, used to generate the design load cases, comprise the following:

(W) Gravity load, due to self-weight of steel, contents and insulation.

(P1) Pressure load, due to design pressure.

(T1) Thermal load due to bypass at minimum and other at maximum design temperature.

(T2) Thermal load due to minimum design temperature (all piping).

(T3) Thermal load due to maximum design temperature (all piping).

(WIN1..4) Wind loads based on 42m/s velocity at 10m (100 year - 3 sec’s gust). Loads are applied in +X for Case 1, -X for Case2, +Z for Case 3 and –Z for Case 4.

Project No : 040176




Location : P11-b


2.4 ALLOWABLE STRESSES

The allowable stresses are in compliance with the criteria specified in ASME B31.3

Material Max temp [ºC ]

Material Properties [N/ mm²]

Allowable stresses [N/mm²]

SMTS SMYS Sh Sa (EXP) Socc (OCC)

A333 Gr. 6 85 414 241138 207 183

Sustained Stress range Occasional

Note : Stress range is based on a stress reduction factor (f) of 1.

2.5 BLAST CALCULATIONS

The blast critical piping has been identified as per doc. no 144-002-HE-TNS-0007, table C1. HP Seperator 200-VS-01 Nozzle N3 and line 8”-CO-200-009-B41-V up to 200-ESV-002 are blast critical. Blast loads are applied from 200-VS-01 Nozzle N3 to deck penetration at EL.+26000 (node 140).

Blast Load: 20 KN/m2

Shape factor: 0.9 (conservative approach resulting in approximately 20% safety margin).

The blast loads are generated using CII wind modeler. The loads are applied in four (4) directions as described in section 2.3, above.A shape factor of 0.9 has been used (conservative approach).

Pipe supports are designed for blast loads between node 30 and node145.

Project No : 040176




Location : P11-b


2.6 PIPE SUPPORTS

All loads on supports are summarised in the Pipe Stress Analysis Output.

The loads include the friction forces. In general a friction coefficient of 0.4 is taken into account for friction between steel surfaces. In special cases where PTFE-sliding pads may be applied a friction coefficient of 0.1 shall be taken into account. The pipe support detail drawings are included in Appendix 2.

2.7 FLANGE CONNECTIONS

Flange connections are modelled in CAESAR II by anchoring together the rigid elements through a CNODE. This enables an easy check of the external loads using CII restraint output summary.

For B16.5 flange analysis, either of the following two methods has been used:

1. External loads acting on these connections are assessed using the ASME BPVC, Section VIII, Division 1, Appendix 2 in combination with Section III, subsection NC. Actual hub length is used.

2. External loads acting on these connections are assessed using the ASME Section III, Division 1, subsection NC-3658.3, ASME B16.5a Flanged Joints with High Strength Bolting, with yield stress at temperature, SY, substituted with B31.3 allowable stress, Sh.

Flange analysis is performed for maximum acting loads and calculations are performed for each flange size in the calculation.

2.8 NOZZLE LOADS

External loads acting on pressure vessel nozzles are compared against the allowable load sheet. In the event that the allowable loads are exceeded, manufacturer’s acceptance is obtained for the higher loads or WRC-107 calculations are carried out.

For pump nozzle loads, vendor allowable values have been used for assessment.

Project No : 040176




Location : P11-b

Document number: 144-111-PI-CAL-006 Rev. no : R1 Page : 9 of 10 3. STRESS ANALYSIS

3.1 COMPUTER MODELFinite element computer models are developed based on the stress isometric included in Appendix 1.

Pipe stress program CAESAR II version 4.50, developed and marketed by COADE Engineering Software has been used for the analysis of the piping systems. This software package is a widely accepted tool to perform comprehensive stress analysis of complex piping systems.

The global co-ordinate system used in the computer model is indicated on the stress isometrics. Small differences in dimensions between the piping isometrics and the calculations may occur, but have no significant effect on the analysis.

The pipe routing of this system is shown below:

Project No : 040176




Location : P11-b

Document number: 144-111-PI-CAL-006 Rev. no : R1 Page : 10 of 10 4. ANALYSIS RESULTS

4.1 STRESSES

The maximum calculated code stresses are summarized below and compared against B31.3 code allowable values. For blast case the calculation method set in document no144-002-PI-SPE-0007 was used. The calculated 3D stress intensities are compared with yield at operating temperature (230N/mm2) multiplied by 4/.

All stresses are found to be within the allowable limits.

Table 5.1.1 Maximum Sustained Stress (SK-006A-R1)

Case No. Node MaterialCode Stress

N/mm²

Allowable Stress

N/mm²

Ratio

9 400 A333 Gr. 6 66.2 137.9 0.48

Table 5.1.2 Maximum Stress Range (SK-006A-R1)


N/mm²

Allowable Stress

N/mm²

Ratio

24 320 A333 Gr. 6 114.6 207 0.55

Table 5.1.3 Maximum Occasional Stress – Wind effects (SK-006A-R1)


N/mm²

Allowable Stress

N/mm²

Ratio

25 400 A333 Gr. 6 72.6 183 0.40

Table 5.1.4 3D Stresses – Blast effects (SK-006B1-R1)

Case No. Node Material3D Stress

N/mm²

Allowable Stress

N/mm²

Ratio

11 145 A333 Gr. 6 119.8 292.7 0.41

4.2 FLANGES

The integrity of the ASME B16.5 flanges, under the maximum external loads, has been checked as outlined in section 2.7. The external loads are found to be acceptable. Detailed flange calculations and the summary have been included in Appendix 4 where required.

4.3 NOZZLE LOADS

The maximum external nozzle loads are listed below and compared with the allowable values. In case nozzle loads exceed the allowable values, the applicable cases are listed separate, showing only the maximum combinations for bending and / or torsion.

Note: Forces in [N] and moments in [Nm]

Project No : 040176




Location : P11-b


Table 4.3.1 Vessel 200-VS- 01 / N3

Design Case

Size Calc. No. Node No.

Fx Fy Fz Mx My Mz

10”-300# SK-006A-R1 31 1884 3493 8020 4998 10896 2332

Allowable values 8600 8500 8600 6000 13000 7000

Blast Case


Fx Fy Fz Mx My Mz

10”-300# SK-006A-R1 31 7214 5307 20003 12382 19862 5509


Table 4.3.2 Vessel 200- HA- 01B / N1B

Design Case


Fx Fy Fz Mx My Mz

10”-300# SK-006A-R1 630 2558 1950 5258 2927 2836 1574


Blast Case


Fx Fy Fz Mx My Mz

10”-300# SK-006B1-R1 630 2702 1838 9220 5759 5679 1735

Allowable values (x 2) 9460 9350 9460 7700 14300 6600

Nozzle loads in all cases for 200- HA- 01B / N1B are within the allowable values.

Nozzle loads in the blast case for 200-VS- 01 / N3 are exceeding the allowable values. These nozzle loads are issued to vendor for approval (refer Appendix 6).

Project no : 040176


Project title : De Ruyter Production Platform

Location : P11-b


Document number : 144-111-PI-CAL-006 Rev. no : R1

APPENDIX 1

STRESS SKETCHES

Project no : 040176



Location : P11-b



APPENDIX 2

PIPE SUPPORT DETAILED DRAWINGS

Hold for: 3-A-1-0972-A3-A-1-0973-A

Project no : 040176



Location : P11-b



APPENDIX 3

CONSTRUCTION ISOMETRICS

Project no : 040176



Location : P11-b



APPENDIX 4

MISCELLANEOUS CALCULATIONS

Project no : 040176



Location : P11-b



APPENDIX 5

CAESAR II PRINTOUT

Project no : 040176



Location : P11-b



APPENDIX 6

NOZZLE LOADS

Documents

144-111-PI-CAL-006_R1